How to select all friends at once in Facebook to invite (New)
Facebook has recently changed its layout, due to whiich previous code doesn't works, well here is the new one
1. Go to your Event, Group or page and click “Invite People”.
2. Once the page has loaded you should see all of your friends, but they are not selected.
4. If all goes well, it selects all of your friends!
alert("Selected: " + lst.length + " Friends");}}; void(0);